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Finding the Fourth Proportional to 7,959.03, 11,938.82 and 2,115.65

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Solution

The fourth proportional to 7,959.03, 11,938.82 and 2,115.65 is: 3,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.03 : 11,938.82 = 2,115.65 : x
  2. Step 2: Convert to fraction form
    7,959.03/11,938.82 = 2,115.65/x
  3. Step 3: Cross multiply
    7,959.03x = 11,938.82 × 2,115.65
  4. Step 4: Simplify right side
    7,959.03x = 25,258,364.53
  5. Step 5: Solve for x
    x = 25,258,364.53/7,959.03
  6. Step 6: Final answer
    x = 3,173.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.